Tropospheric and Stratospheric Causal Pathways Between the MJO and NAO

Barnes, Elizabeth A.; Samarasinghe, Savini M.; Ebert‐Uphoff, Imme; Furtado, Jason C.

doi:10.1029/2019jd031024

i

Tropospheric and Stratospheric Causal Pathways Between the MJO and NAO

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2019
By Barnes, Elizabeth A. ; Samarasinghe, Savini M. ; Ebert‐Uphoff, Imme ; ...

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Journal Title:

Journal of Geophysical Research: Atmospheres
Personal Author:

Barnes, Elizabeth A. ; Samarasinghe, Savini M. ; Ebert‐Uphoff, Imme ; Furtado, Jason C.
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research)
Description:

Previous work has shown that the Madden-Julian Oscillation (MJO) can influence the North Atlantic Oscillation (NAO) via a Rossby wave teleconnection that propagates through the troposphere (i.e., a tropospheric pathway). In addition, recent work suggests that the MJO can influence the stratospheric polar vortex, which is also known to influence the tropospheric NAO—thus, there likely exists astratospheric pathway for MJO influence as well. Here, we apply two methods to shed more light on the pathways linking the MJO to the NAO. First, we use a traditional approach in climate science based on analyzing conditional probabilities. Second, we use methods from causal discovery theory based onprobabilistic graphical models. Together, these two analysis approaches reveal that the MJO can impact the NAO via both a tropospheric and stratospheric pathway. The stratospheric pathway is shown to come
Keywords:

Atmospheric Science Earth And Planetary Sciences (miscellaneous) Geophysics Space And Planetary Science Earth And Planetary Sciences (miscellaneous) Space And Planetary Science Earth And Planetary Sciences (miscellaneous) Space And Planetary Science
Source:

Journal of Geophysical Research: Atmospheres, 124(16), 9356-9371
DOI:

https://doi.org/10.1029/2019jd031024
ISSN:

2169-897X ; 2169-8996
Format:

PDF
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
Funding:

Grant no. NA16OAR4310090
Rights Information:

Other
Compliance:

Library
Main Document Checksum:

urn:sha256:7263f51915d879c1f918339619b410531d1bef9cd74cef61151644055d618a4b
Download URL:

https://repository.library.noaa.gov/view/noaa/52556/noaa_52556_DS1.pdf
File Type:

[PDF - 2.74 MB ]

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